feat(templates): add localized push templates and actions

Share template keys across email and push with independent editors and revisions. Render localized actions and preserve version-one delivery.

Ref: IT-1627

HrynCo.NotificationService.Web/Views/AdminPushChannels/Edit.cshtml

@@ -73,10 +73,26 @@
             </div>
             <div class="modal-body">
                 <p class="text-muted small">Tests the current form settings without saving. Blank credentials use the saved credentials only when the Firebase project is unchanged.</p>
-                <p class="text-muted small">Sends a neutral notification directly through Firebase. This tests the channel, not Invemory account binding, navigation or background handling. Use your own test device only.</p>
+                <label for="pushTestVersion" class="form-label fw-semibold">Test format</label>
+                <select id="pushTestVersion" class="form-select mb-2" aria-describedby="pushTestFormatHelp">
+                    <option value="1">Legacy — simple notification</option>
+                    <option value="2">Version 2 — notification with a button</option>
+                </select>
+                <p id="pushTestFormatHelp" class="text-muted small">Legacy sends the existing neutral notification. Version 2 tests the action payload and requires a client that supports buttons. Firebase acceptance alone does not confirm display or navigation. Use your own test device only.</p>
                 <label for="pushRecipientToken" class="form-label fw-semibold">Recipient token</label>
                 <textarea id="pushRecipientToken" class="form-control font-monospace" rows="3" maxlength="4096" autocomplete="off" spellcheck="false"></textarea>
                 <div class="form-text">Not saved as channel configuration. Cleared after the test or when this dialog closes.</div>
+                <fieldset id="pushButtonTestFields" class="mt-3" hidden>
+                    <legend class="fs-6">Button test</legend>
+                    <label for="pushTestBindingId" class="form-label">Current device binding ID</label>
+                    <input id="pushTestBindingId" class="form-control mb-2" autocomplete="off" spellcheck="false" />
+                    <div class="form-text mb-2">Use the actual binding of the recipient installation. An invented or outdated binding will be rejected by the app.</div>
+                    <label for="pushTestActionKey" class="form-label">Section action key</label>
+                    <input id="pushTestActionKey" class="form-control mb-2" maxlength="100" placeholder="Action supported by your app" spellcheck="false" />
+                    <label for="pushTestButtonLabel" class="form-label">Button label</label>
+                    <input id="pushTestButtonLabel" class="form-control" maxlength="100" value="Перейти в розділ" />
+                    <div class="form-text">The button and notification tap use the same action. No object ID is needed for a section.</div>
+                </fieldset>
                 <div id="pushSendResult" class="alert d-none mt-3" role="status" aria-live="polite"></div>
             </div>
             <div class="modal-footer">
@@ -101,6 +117,8 @@
         const authorizationButton = document.getElementById('pushAuthorizationBtn');
         const sendButton = document.getElementById('pushSendBtn');
         const modalButton = document.getElementById('pushTestModalBtn');
+        const version = document.getElementById('pushTestVersion');
+        const binding = document.getElementById('pushTestBindingId');
         let busy = false;
 
         function showResult(target, success, message) {
@@ -114,7 +132,11 @@
                 channelId: id === '00000000-0000-0000-0000-000000000000' ? null : id,
                 firebaseProjectId: form.querySelector('[name="FirebaseProjectId"]').value,
                 credentialsJson: form.querySelector('[name="CredentialsJson"]').value,
-                recipientToken: send ? token.value.trim() : null
+                recipientToken: send ? token.value.trim() : null,
+                version: Number(version.value),
+                bindingId: send && version.value === '2' ? binding.value.trim() || null : null,
+                actionKey: document.getElementById('pushTestActionKey').value,
+                buttonLabel: document.getElementById('pushTestButtonLabel').value
             };
         }
 
@@ -152,10 +174,14 @@
 
         authorizationButton.addEventListener('click', () => runTest(false));
         sendButton.addEventListener('click', () => runTest(true));
+        version.addEventListener('change', () => {
+            document.getElementById('pushButtonTestFields').hidden = version.value !== '2';
+            document.getElementById('pushSendResult').className = 'alert d-none';
+        });
         modalButton.addEventListener('click', () => {
             document.getElementById('pushSendResult').className = 'alert d-none';
             bootstrap.Modal.getOrCreateInstance(modal).show();
         });
-        modal.addEventListener('hidden.bs.modal', () => { token.value = ''; });
+        modal.addEventListener('hidden.bs.modal', () => { token.value = ''; binding.value = ''; });
     });
 </script>